ab Statistid Amedical researcher says that less than 79% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of300 adults in that country, 75% think that healthy children should be required to be vaccinated. At a= 0.01, is there enough evidence to support the researcher'sclaim? Complete parts (a) through (e) below.Identify the critical value(s) for this test.=-2.33(Round to two decimal places as needed. Use a comma to separate answers as needed.)Identify the rejection region(s). Select the correct choice below and fill in the answer box(es) to complete your choice.(Round to two decimal places as needed.)ddr. Teecher es. every timegs an argel ge1s his winga."OA The rejection region is z>y CoursesOB. The rejection regions are z<and z>ourse Home&c. The rejection region isz< -2.33OD. The rejection region isAssignments(c) Find the standardized test statistic z.Gradebook(Round to two decimal places as needed.)Chapter Contentst: 0еТеxtHelp me solve thisView an exampleGet more help-Clear allCheck answerMultimedia LibraryStudy Plan47°F A @ aO Type here to search+6610/05/1775DeletePrtScInsertF11F12F10

The formula to find the standardized z - test statistic for testing the significance of one…

Answered: A medical researcher says that less…

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter4: Eigenvalues And Eigenvectors

Section4.6: Applications And The Perron-frobenius Theorem

Problem 25EQ

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A research center claims that at least 2626% of adults in a certain country think that their taxes will be audited. In a random sample of 900900 adults in that country in a recent year, 2323% say they are concerned that their taxes will be audited. At alphaαequals=0.100.10, is there enough evidence to reject the center's claim? Complete parts (a) through (e) below. Identify the critical values
A research center claims that more than 27% of employees in a certain country have changed jobs in the past three years. In a random sample of 260 people from that country, 78 have changed jobs in the past three years. At α=0.05, is there enough evidence to support the center's claim? Complete parts (a) through (e) below. a. Identify the claim and state HO and Ha. b. find the critical value(s) and identify the rejection region(s) c. Find the standardized test statistic z. d. Decide whether to reject or fail to reject the null hypothesis and interpret the decision in the context of the original claim.
A washing machine manufacturer advertises that the median life of the machines is at least 8 years. A consumer advocacy group located 20 of these machines and found that 12 of them actually lasted less than 8 years, with none of them lasting exactly 8 years. At α =0.05, test the claim that the median life is less than 8 hours. A. What is the test statistic? B. What is the critical value?
A researcher wanted to know whether exercise could alleviate depression. Using Kruskal-Wallis test, the researcher finds the calculated H is smaller than the critical value. What is the correct conclusion from the test result? a. Reject Ho. Exercise does not affect depression level. b. Accept Ho. Exercise does not affect depression level. c. Reject Ho. Exercise affect depression level. d. Ho cannot be rejected. Exercise does not affect depression level.
You predict that a salesclerk at the mall will take longer to help a potential customer that is dressed in sloppy clothes vs a potential customer dressed in business attire. After running the study you find support for your hypothesis with the obtained value exceeding the critical value at the p < .05 level. Why wouldn't you want to say that you proved your hypothesis correct? What other sources might be a better explanation for your findings?
A washing machine manufacturer advertises that the median life of the machines is at least 8 years. A consumer advocacy group located 20 of these machines and found that 12 of them actually lasted less than 8 years, with none of them lasting exactly 8 years. At α α =0.05, test the claim that the median life is less than 8 hours. A. What is the test statistic? B. What is the critical value? C. What is the decision?
Is achieving a basic skill level related to the location of the school? The results of a random sample of students by the location of school and the number of students achieving basic skill levels in three subjects is shown in the contingency table. At a=0.10, test the hypothesis that the variables are independent. 1. Find the critical value. 2. Calculate the test statistic
1. What hypothesis test is appropriate for the study? 2. What is the value of the df? 3. What is the critical value?
Studies have shown that omega-3 fatty acids have a wide variety of health benefits. Omega-3 oils can be found in foods such as fish, walnuts, and flaxseed. A company selling milled flaxseed advertises that one tablespoon of the product contains, on average, at least 3800 mg of ALNA, the primary omega-3. a) The company plans to conduct a test to ensure that there is sufficient evidence that its claimiscorrect. Tobesafe,thecompanywantstomakesurethatevidenceshowsthe average is higher than 3800 mg. What are the null and alternative hypotheses? b) Suppose, instead, that a consumer organization plans to conduct a test to see if there is evidence against the claim that the product contains an average of 3800 mg per tablespoon. The consumer organization will only take action if it finds evidence that the claim made by the company is false and that the actual average amount of omega-3 is less than 3800 mg. What are the null and alternative hypotheses?
Calculate the X² statistic then compare it with the critical value to determine if we will reject or fail to reject the null hypothesis that "There is no difference in the proportion of students that choose STEM, Social Sciences and Liberal Arts"
What is the critical value? What is the p-value?
An inventor, working at a science tech lab, believes innovations in satellites are increasing. The inventor would like to test the claim that the average number of new ideas for satellite development per month at the science tech lab is over 60 new ideas. Using the computed test statistic of 1.05 and the critical value of 1.28, is there enough evidence for the inventor to reject the null hypothesis? Use the graph below to interpret the critical value. First select the appropriate test type (left-, right-, or two- tailed), then plot the points along the x-axis (for the critical value and test statistic), and use them to choose the appropriate interpretation.

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